In the sidebar, head to Windows Logs > System, then click the Filter Current Log button on the right side of the window. Click the Start menu, search for "Event Viewer," and launch the tool. I’ve also had luck searching Windows’ Event Viewer for information. If that command didn’t give you useful information, try this one: powercfg -waketimers In other cases, it may list a specific hardware device, and you can skip down to the relevant section in this article, or do some extra Googling on what settings to change on that device.
In that case, your search is over, and you can adjust that program’s settings or uninstall it to stop the problem. For example, the last time my workstation woke up, it was due to my cloud backup program running its scheduled backup for the evening. If you’re lucky, it’ll give you a pretty clear answer. Type the following command and press Enter: powercfg -lastwake Windows knows what woke up your computer most recently, so the next time it wakes up unexpectedly, open the Start menu and search for “cmd,” then right-click the Command Prompt and choose Run As Administrator.
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